Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 216, Issue 10, Pages 1043-1054Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201400568
Keywords
conformations; gelation; polyfluorenes; solvent effects; steric hindrance effects
Categories
Funding
- 973 projects [2015CB932200]
- National Natural Science Funds for Excellent Young Scholar [21322402]
- National Natural Science Foundation of China [21274064, 21144004, 61177029, 20974046]
- Program for New Century Excellent Talents in University [NCET-11-0992]
- Ministry of Education of China [20133223110007]
- Excellent Science and Technology Innovation Team of Jiangsu Higher Education Institutions
- Natural Science Foundation of Jiangsu Province [BK2011761, BK2008053, SJ209003]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, PAPD [YX03001]
- China Postdoctoral Science Foundation [2014M551575]
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Clarification of the solvent effects of bulky -conjugated polymers on the conformation behavior and morphology evolution of the chain from solution to thin film is the main prerequisite for the molecular design of printable polymer light-emitting materials. Here, three bulky poly(9,9-diarylfluorene)s (PFs) with the steric hindrance effect are synthesized to examine gelation behaviors, -phase conformation, film morphology, and electroluminescence (EL) spectra in three solvents. Their gelation behaviors occur in 1,2-dichloroethane (DCE) of high concentrations, featuring emission bands of approximate to 470 nm as well as the -phase conformation. Bulky PFs also exhibit different solvent effects on the morphology and green emission bands. Compared with other bulky PFs, poly(spirofluorenexanthene)s have obvious advantages in terms of the solvent-independent emission, high quantum yield, and air-stable photoluminescence, as well as the EL spectra. Poly(SFX) will be potential components for the formula of optical inks in printed electronics.
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